Android/iOS: Zombies, Run! is one of our favorite running apps because it motivates you by tasking you with escaping from zombies instead of just throwing stats at you. Now, the sequel, Zombies, Run! 2 adds a ton of improvements to the core experience including more missions and a redesigned interface.

Zombies, Run! 2 sees new missions come in the form of an in-app purchase for season 2 that's currently on sale for $1.99 (if you haven't tried Zombies, Run! yet, the app itself is also on sale right now for $3.99). You'll get seven of the new missions for free, and then an extra mission will be added weekly starting later this month.

On top of a bunch of new missions for season 2, the entire app was overhauled for a much cleaner look, and improvements to the base building element add a new task to take care of when you're not running. The overhaul to the interface makes the app a lot easier to use, and if you had trouble getting into Zombies, Run! when it was first released because it was a little ugly, it might be worth another look. Zombies, Run 2 is a free update for current users, but you'll need to snag the season pass to get access to all of the new missions.